Dear Dirk,
In message <4a5a3439.9000...@googlemail.com> you wrote:
>
> > And as I mantioned before: I do not oppose the change itself. I agree
> > that it is useful and actually a very good idea to support users who
> > really need this. The only things I oppose are (1) making this the
> > default (or even mandatory) for all tool chains and (2) making it
> > architecture-dependent.
>
> So to do in in positive logic, what do you propose how to enable it?
> In the other mail you mentioned "The selection could be done by
> passing some argument or environment variables to "make""?
Right.
> Maybe you could give some (Makefile?) (pseudo?) code that
> Jean-Christophe gets an idea how to do this correctly? Sorry if this
> was given already in the Makefile discussion and I missed it.
No example was given yet.
If someone puts enough effort into it, a clean implementation would
probably provide a "spec string" with a "%G" definition to the CFLAGS
and thus to the cross compiler's command-line options to override the
GCC-provided definition of 'libgcc' with a new (U-Boot provided) one
(see gcc.info, Node: Spec Files, Section 3.15 Specifying subprocesses
and the switches to pass to them).
A simpler implementation could use the '-B_prefix_' command-line
option to select a different run-time support library.
The feature itself could for example be triggered by using something
like
$ make USE_PRIVATE_LIBGCC=yes
or
$ USE_PRIVATE_LIBGCC=yes
$ export USE_PRIVATE_LIBGCC
$ make
or similar.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
Philosophy is a game with objectives and no rules.
Mathematics is a game with rules and no objectives.
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